Data communications system

Details Data communications system Data communications system

1989-10-17

1991-07-16

Crosland, Donnie L.

Communications: electrical

Systems

Selsyn type

340310R, 375 8, 379 98, 379413, H04M 1104

Patent

active

050328190

ABSTRACT:
A data communications system includes a high impedance input circuit, which serves as an input circuit linking between a communications interface and a data terminal equipment, and a power supply circuit which obtains a receiving signal from an input terminal of the high impedance input circuit and draws electric power from the receiving signal to supply to the data communications system.

REFERENCES:
patent: 4373117 (1983-02-01), Pierce
patent: 4395590 (1983-07-01), Pierce et al.
patent: 4415774 (1983-11-01), Driver
patent: 4578533 (1986-03-01), Pierce
patent: 4592069 (1986-05-01), Redding

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